It's kind of funny that heating up the oil to the point of smoking is considered a healthy alternative to teflon coated pans. When oil is heated up to the point of smoking it produces carcinogenic compounds.
Comparing the misc acrylamide and other byproducts of seasoning a cast iron skillet to the PFAS and other byproducts of teflon production is nonsense.
Yes, complex hydrocarbons are not good for you, but PFOAs and their ilk are really really really bad for you and the environment. It's like comparing spent nuclear rods with brazil nuts. Yes, both are radioactive, but there is zero equivalence.
Not significant. You aren't burning the oil or keeping it at high temp for a long time, you are just getting hot enough to smoke, then you cut the heat. That polymerizes the oil into a non-polar coating. Can't get non-stick without some kind of polymer that things don't stick to.
